The Russian Synod (and perhaps the Serbs) commemorate St. Harold, Last Orthodox King of England, and his companions who died at Hastings as a martyr.
Walsingham, the site of the principal Marian shrine in England is now largely an Orthodox town (!!).
Of course this year, the more important Forgiveness Sunday happens (for New Calendar Orthodox) to coincide with the feast of St. Patrick, Enlightener of Ireland.
If I have in any way offended you, my brothers and sisters, forgive me. (A 'virtual' Forgiveness Vespers is a new tradition on many Orthodox discussion sites.)
One of King Harold's daughters married Vladimir Monomach, Prince of Kiev.